Until now the messages, photos and details of every user have been stored on a database, even including most of those who shut down their profile permanently.
到现在为止,每个用户的消息、照片和详细信息已经被存储在了数据库中,甚至包括一些永久注销了的用户的资料。
For example, common scalability problems, including synchronization issues and database contention, do not surface until load tests.
例如,常见的可伸缩性问题,包括同步问题和数据库连接,直到负载测试的时候还没有表露。
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